On 29th November, 2014 at 15:43 h, an ATR 72 aircraft with nationality and registration marks 5N-BPG operated by Overland Airways Limited with call sign OAL1186 departed Nnamdi Azikiwe International Airport, Abuja (DNAA) on a scheduled passenger flight for Ilorin Airport, (DNIL) on an Instrument Flight Rules (IFR) flight plan. Onboard were 63 persons including two flight crew, two cabin crew and 59 passengers. The Pilot was the Pilot Flying (PF) and the Co-Pilot was the Pilot Monitoring (PM).
At 15:50 h, at about 7,000 ft during climb, the flight crew stated that, the LO LVL (low Level) light of the Blue hydraulic system came ON; the HYD LO LVL checklist of the ATR 72 QRH (Quick Reference Handbook) on page 2.19 was executed and the flight continued.
At 16:01 h, OAL1186 established contact with Ilorin Tower (TWR) and the TWR cleared OAL1186 for VOR approach Runway (RWY) 05.
At 16:30 h, while on final approach, the flight crew observed that the LO LVL light of the Green hydraulic system came ON. The HYD LO LVL and BOTH HYD SYS LOSS checklists of the ATR 72 QRH pages 2.19 and 2.20 were executed.